Guess the word (Zgadnij Słowo) application uses 3rd party libraries to track user interactions within the app and to automatically report crash data for diagnostics purposes.
Those libraries are:
Google Analytics for Firebase
Firebase Crashlytics
Events which are tracked:
Application was opened
Game was started
Application doesn't link data from those libraries with identity of the user. It does not collect / store any other information about user and his activity in the application.